how to use the matcher function from the underscore library in typescript

To use the matcher function from the Underscore library in TypeScript, follow these steps:

1. First, install the Underscore library using npm:

index.ts
npm install underscore
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2. Next, import the matcher function from the Underscore library in your TypeScript file:

index.ts
import { matcher } from 'underscore';
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3. Now, you can use the matcher function to create a predicate function that can be used to match objects based on their properties. The matcher function takes an object as its argument and returns a function that can be used to match other objects against the properties of the original object. For example:

index.ts
const personMatcher = matcher({ name: 'John', age: 30 });

const person1 = { name: 'John', age: 30, job: 'Developer' };
const person2 = { name: 'Jane', age: 25, job: 'Designer' };

console.log(personMatcher(person1)); // true
console.log(personMatcher(person2)); // false
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In the above example, we first create a personMatcher function using the matcher function and an object with properties that we want to match against. We then test this function against two different objects and see that it correctly matches person1 but not person2.